Re: [Elecraft] 200 Hz 5-pole filter
Hi all, I found over there the Plots for the Elecraft filters http://www.elecraft.com/K3/K3_filter_plots.htm but KFL3A-200 is missing. Is it possible to find somewhere the Plot also for this filter please? Thank You, 73 - Petr, OK1RP - http://ok1rp.blogspot.com -- View this message in context: http://elecraft.365791.n2.nabble.com/200-Hz-5-pole-filter-tp7605299p7605430.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Since Sherwood's Dynamic Range Narrow Spaced measurement is of great interest to CW operators, it only makes sense to make the measurement using a CW filter, optional or not. The measurement would be meaningless to CW operators if made using the stock sideband filter. 73, Bill - NA5DX On 7/25/2015 1:47 PM, elecraft-requ...@mailman.qth.net wrote: Message: 27 Date: Sat, 25 Jul 2015 11:04:20 -0700 (MST) From: XE3/K5ENS via Elecraftelecraft@mailman.qth.net To:elecraft@mailman.qth.net Subject: Re: [Elecraft] 200 Hz 5-pole filter Message-ID:1437847460881-7605322.p...@n2.nabble.com Content-Type: text/plain; charset=us-ascii Apples and oranges. The K3 is still no 2 with the 200 Hz 5-pole filter. You just can no longer buy the radio with that filter. I have always found it a little strange that Sherwood never stated that the filters used in his test were optional on the K3? If the K3 was tested with the stock filter it may make it into the top 10. Don't get me wrong I have a K3S on order. I'm just looking at the data __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
On Sun,7/26/2015 5:33 PM, Bill Breeden wrote: The point I am trying to make is that a K3 with a 2.7 KHz filter and the DSP cranked down to 400 Hz will not perform as well for CW during crowded band conditions as a K3 with a 400 Hz filter. Hi Bill, That point is not lost on anyone, and is the reason that serious contesters use narrow roofing filters. I said exactly that in my earlier response. But the point that you are missing is that the K3, K3S, and KX3 are complete radios with the stock 2.7 kHz 5-pole or 2.8 kHz 8-pole roofing filters, and are comparable to the receivers we have used for as long as I have been a ham (60 years). What's different are 1) the some of the hardware with which those older radios and the K3/K3S/KX3 are built. Our older receivers used physical coils and capacitors in the IF, while these newer ones simulate those Ls and Cs in DSP; 2) the system architecture that Wayne developed (for example, his choice of IF frequencies, his methods of reducing phase noise, keying transients, etc.; and 3) they're a lot better radios that most of those older ones. A ham who doesn't participate in major contests is unlikely to need anything more than the 2.7 or 2.8 kHz roofing filter. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Jim, I disagree. The selected roofing filter is the first IF filter in a K3. You might want to read what Eric and Wayne have to say on the subject at the following link: http://www.elecraft.com/K3/Roofing_Filters.htm 73, Bill - NA5DX *Jim Brown*jim at audiosystemsgroup.commailto:elecraft%40mailman.qth.net?Subject=Re%3A%20%5BElecraft%5D%20200%20Hz%205-pole%20filterIn-Reply-To=%3C55B55B5D.5070800%40audiosystemsgroup.com%3E /Sun Jul 26 18:12:45 EDT 2015/ * Previous message:[Elecraft] 200 Hz 5-pole filter http://mailman.qth.net/pipermail/elecraft/2015-July/219735.html * Next message:[Elecraft] KX3 go kit? http://mailman.qth.net/pipermail/elecraft/2015-July/219676.html * *Messages sorted by:*[ date ] http://mailman.qth.net/pipermail/elecraft/2015-July/date.html#219737[ thread ] http://mailman.qth.net/pipermail/elecraft/2015-July/thread.html#219737[ subject ] http://mailman.qth.net/pipermail/elecraft/2015-July/subject.html#219737[ author ] http://mailman.qth.net/pipermail/elecraft/2015-July/author.html#219737 On Sun,7/26/2015 2:02 PM, Bill Breeden wrote: /Since Sherwood's Dynamic Range Narrow Spaced measurement is of great //interest to CW operators, it only makes sense to make the measurement //using a CW filter, optional or not. The measurement would be //meaningless to CW operators if made using the stock sideband filter. / Not really -- the K3, K3S, and KX3 IF filters are implemented in DSP. The plug-in filters are additional roofing filters that protect the DSP from overload by strong signals outside of their passband. The K3, K3S, and KX3 have very good CW receivers without the optional roofing filters. The roofing filters simply allow them to work very close to very strong signals, AND cascade with the DSP filter to provide additional rejection outside the passband. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Wes, Rob Sherwood's presentation at the following link answers the why question a lot better than I can: http://www.sherweng.com/RochesterMN2009/NC0B-W0DXCC-4dRochester_MN.pdf At the following link, Eric explains why selecting a narrow filter for CW operation in a K3 offers superior performance over selecting a wide (sideband) filter and adjusting the DSP to a narrow bandwidth: http://www.elecraft.com/K3/Roofing_Filters.htm The point I am trying to make is that a K3 with a 2.7 KHz filter and the DSP cranked down to 400 Hz will not perform as well for CW during crowded band conditions as a K3 with a 400 Hz filter. 73, Bill - NA5DX *Wes (N7WS)*wes at triconet.orgmailto:elecraft%40mailman.qth.net?Subject=Re%3A%20%5BElecraft%5D%20200%20Hz%205-pole%20filterIn-Reply-To=%3C55B571C4.1010009%40triconet.org%3E /Sun Jul 26 19:48:20 EDT 2015/ * Previous message:[Elecraft] 200 Hz 5-pole filter http://mailman.qth.net/pipermail/elecraft/2015-July/219737.html * Next message:[Elecraft] 200 Hz 5-pole filter http://mailman.qth.net/pipermail/elecraft/2015-July/219738.html * *Messages sorted by:*[ date ] http://mailman.qth.net/pipermail/elecraft/2015-July/date.html#219744[ thread ] http://mailman.qth.net/pipermail/elecraft/2015-July/thread.html#219744[ subject ] http://mailman.qth.net/pipermail/elecraft/2015-July/subject.html#219744[ author ] http://mailman.qth.net/pipermail/elecraft/2015-July/author.html#219744 Why? On 7/26/2015 2:02 PM, Bill Breeden wrote: ///Since Sherwood's Dynamic Range Narrow Spaced measurement is of great interest //to CW operators, it only makes sense to make the measurement using a CW //filter, optional or not. The measurement would be meaningless to CW operators //if made using the stock sideband filter. 73, Bill - NA5DX / __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Agreed (but not meaningless)! The additional narrow cw filters clearly provide a BIG improvement over the wider SSB Filters(e.g., the 400 HZ filter shows a 16 db improvement in 3IMDDR and 35 db improvement in BDR over the stock 2700 Hz SSB Filters). Meaning it is very helpful to cw operators to know how the radio performs with the more narrow cw filters. The ARRL Table in the K3 2009 review shows the figures. Can't tell how the rig would have tested if the DSP was narrowed to, say, 400 HZ while using the wider SSB filter Bob/AA6VB From: Bill Breeden breede...@cableone.net To: elecraft@mailman.qth.net Sent: Sunday, July 26, 2015 2:02 PM Subject: Re: [Elecraft] 200 Hz 5-pole filter Since Sherwood's Dynamic Range Narrow Spaced measurement is of great interest to CW operators, it only makes sense to make the measurement using a CW filter, optional or not. The measurement would be meaningless to CW operators if made using the stock sideband filter. 73, Bill - NA5DX On 7/25/2015 1:47 PM, elecraft-requ...@mailman.qth.net wrote: Message: 27 Date: Sat, 25 Jul 2015 11:04:20 -0700 (MST) From: XE3/K5ENS via Elecraftelecraft@mailman.qth.net To:elecraft@mailman.qth.net Subject: Re: [Elecraft] 200 Hz 5-pole filter Message-ID:1437847460881-7605322.p...@n2.nabble.com Content-Type: text/plain; charset=us-ascii Apples and oranges. The K3 is still no 2 with the 200 Hz 5-pole filter. You just can no longer buy the radio with that filter. I have always found it a little strange that Sherwood never stated that the filters used in his test were optional on the K3? If the K3 was tested with the stock filter it may make it into the top 10. Don't get me wrong I have a K3S on order. I'm just looking at the data __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to bobchor...@yahoo.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
On Sun,7/26/2015 2:02 PM, Bill Breeden wrote: Since Sherwood's Dynamic Range Narrow Spaced measurement is of great interest to CW operators, it only makes sense to make the measurement using a CW filter, optional or not. The measurement would be meaningless to CW operators if made using the stock sideband filter. Not really -- the K3, K3S, and KX3 IF filters are implemented in DSP. The plug-in filters are additional roofing filters that protect the DSP from overload by strong signals outside of their passband. The K3, K3S, and KX3 have very good CW receivers without the optional roofing filters. The roofing filters simply allow them to work very close to very strong signals, AND cascade with the DSP filter to provide additional rejection outside the passband. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Why? On 7/26/2015 2:02 PM, Bill Breeden wrote: Since Sherwood's Dynamic Range Narrow Spaced measurement is of great interest to CW operators, it only makes sense to make the measurement using a CW filter, optional or not. The measurement would be meaningless to CW operators if made using the stock sideband filter. 73, Bill - NA5DX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Oh but Rob does.See the notes at the bottom of the page for his Receiver Test Data. These reference p and q. These identify the filters used. Elecraft states what are optional vs. standard filters. */p/* with 200 Hz 5-pole filter /*q*/ with 400 Hz 8-pole filter 73 Bob, K4TAX On 7/25/2015 1:04 PM, XE3/K5ENS via Elecraft wrote: Apples and oranges. The K3 is still no 2 with the 200 Hz 5-pole filter. You just can no longer buy the radio with that filter. I have always found it a little strange that Sherwood never stated that the filters used in his test were optional on the K3? If the K3 was tested with the stock filter it may make it into the top 10. Don't get me wrong I have a K3S on order. I'm just looking at the data. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
One can download the Sherwood list and save it to an EXCEL file. Then sort it by your own choosing. The Sherwood list is presented on one parameter only being dynamic range, narrow spaced. There's multiple other parameters that make for a fine receiver. 73 Bob, K4TAX On 7/25/2015 3:20 PM, Scott Manthe wrote: No, and it's also from 2009, but that's not the point. The point is that there isn't going to be much difference between the 250hz 8 pole filter and the 200hz 5 pole filter. But think about your comment for a moment. A stock K3 with no additional filters is that good enough to rank that high. It might actually rank higher, because the ARRL and Sherwood methodologies differ. In any case, far too many people are far too concerned about the Sherwood rankings. Most people don't understand what the data mean and only worry about where a radio ranks on the list. The few dB between radios at the top of the Sherwood rankings means the list could probably be reordered based on component differences in production runs. Certainly a radio near the top ten is good enough. 73, Scott N9AA On 7/25/15 3:29 PM, XE3/K5ENS via Elecraft wrote: That is not the Sherwood receiver list that everyone covets. Taking this data the K3 would be about 11th or 12th on the list with the stock 2.7hz filter. -- View this message in context: http://elecraft.365791.n2.nabble.com/200-Hz-5-pole-filter-tp7605299p7605328.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to scott.man...@gmail.com . __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rmcg...@blomand.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
On 2015-07-25 2:04 PM, XE3/K5ENS via Elecraft wrote: Apples and oranges. Nonsense. The IMDDR3 of a conventional transceiver will improve significantly if one turns on the attenuator. Reducing overall input to the Flex series 6 to keep the level below the ADC limit is no different than adding an attenuator to a conventional transceiver. 73, ... Joe, W4TV On 2015-07-25 2:04 PM, XE3/K5ENS via Elecraft wrote: Apples and oranges. The K3 is still no 2 with the 200 Hz 5-pole filter. You just can no longer buy the radio with that filter. I have always found it a little strange that Sherwood never stated that the filters used in his test were optional on the K3? If the K3 was tested with the stock filter it may make it into the top 10. Don't get me wrong I have a K3S on order. I'm just looking at the data. -- View this message in context: http://elecraft.365791.n2.nabble.com/200-Hz-5-pole-filter-tp7605299p7605322.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to li...@subich.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
That is not the Sherwood receiver list that everyone covets. Taking this data the K3 would be about 11th or 12th on the list with the stock 2.7hz filter. -- View this message in context: http://elecraft.365791.n2.nabble.com/200-Hz-5-pole-filter-tp7605299p7605328.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Not in most cases, since turning on the attenuator significantly reduces the MDS (sensitivity) of the RX. IMDDR3 is the difference between the input RX sig levels that created the IMD and the MDS of the RX. It may increase IMDDR3 slightly, or even reduce it, depending on which RX stages go into distortion at high levels first. But who wants a deaf RX that can not hear down to the noise floor of the band? What turning on the attenuator (or having a poor sensitivity RX) -does- do is artificially increase the iP3 number, rendering it meaningless as a number for comparing different receivers which have -different- RX sensitivities for that measurement. Some manufacturers have gamed this number for years. For best comparisons, receivers should be compared at the same sensitivity level. Eric elecraft.com _..._ On Jul 25, 2015, at 11:17 AM, Joe Subich, W4TV li...@subich.com wrote: On 2015-07-25 2:04 PM, XE3/K5ENS via Elecraft wrote: Apples and oranges. Nonsense. The IMDDR3 of a conventional transceiver will improve significantly if one turns on the attenuator. Reducing overall input to the Flex series 6 to keep the level below the ADC limit is no different than adding an attenuator to a conventional transceiver. 73, ... Joe, W4TV On 2015-07-25 2:04 PM, XE3/K5ENS via Elecraft wrote: Apples and oranges. The K3 is still no 2 with the 200 Hz 5-pole filter. You just can no longer buy the radio with that filter. I have always found it a little strange that Sherwood never stated that the filters used in his test were optional on the K3? If the K3 was tested with the stock filter it may make it into the top 10. Don't get me wrong I have a K3S on order. I'm just looking at the data. -- View this message in context: http://elecraft.365791.n2.nabble.com/200-Hz-5-pole-filter-tp7605299p7605322.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to li...@subich.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to eric.swa...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
We're hoping to add the 200-Hz filter back to our product line as soon as possible. Meanwhile, the 400-Hz and 250-Hz filters also do an excellent job. As I've mentioned before, any radio with 2-kHz IMDDR3 numbers in the 100-dB-plus range is going to be a solid performer on the air. A dB here or there above this level is really splitting hairs; it speaks more to an engineering achievement that a required level for most operators. That said, we're happy to have two of our radios in Sherwood's top four, especially when you consider the difference in price. And if you take blocking dynamic range into consideration, as well as the various footnotes, the K3S is second to none. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
No, and it's also from 2009, but that's not the point. The point is that there isn't going to be much difference between the 250hz 8 pole filter and the 200hz 5 pole filter. But think about your comment for a moment. A stock K3 with no additional filters is that good enough to rank that high. It might actually rank higher, because the ARRL and Sherwood methodologies differ. In any case, far too many people are far too concerned about the Sherwood rankings. Most people don't understand what the data mean and only worry about where a radio ranks on the list. The few dB between radios at the top of the Sherwood rankings means the list could probably be reordered based on component differences in production runs. Certainly a radio near the top ten is good enough. 73, Scott N9AA On 7/25/15 3:29 PM, XE3/K5ENS via Elecraft wrote: That is not the Sherwood receiver list that everyone covets. Taking this data the K3 would be about 11th or 12th on the list with the stock 2.7hz filter. -- View this message in context: http://elecraft.365791.n2.nabble.com/200-Hz-5-pole-filter-tp7605299p7605328.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to scott.man...@gmail.com . __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Why are you talking about the Flex? I don't care where it is at on Sherwood's list. I never plan to own one. -- View this message in context: http://elecraft.365791.n2.nabble.com/200-Hz-5-pole-filter-tp7605299p7605324.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Take a look at Table 2 on the bottom of page 4 of this PDF: http://www.elecraft.com/K3/k3_arrl_review_jan09.pdf Scott N9AA On 7/25/15 1:45 PM, XE3/K5ENS via Elecraft wrote: That kinda voids Sherwood's no 2 ranking for the radio? -- View this message in context: http://elecraft.365791.n2.nabble.com/200-Hz-5-pole-filter-tp7605299p7605320.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to scott.man...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Somehow what I like on the air, how it sounds, is of more interest to me that what's in an xls file, Bob. So I'm in accord with In any case, far too many people are far too concerned about the Sherwood rankings. The data is interesting, but not of primary interest -- to me. 73, Phil W7OX On 7/25/15 3:46 PM, Bob McGraw - K4TAX wrote: One can download the Sherwood list and save it to an EXCEL file. Then sort it by your own choosing. The Sherwood list is presented on one parameter only being dynamic range, narrow spaced. There's multiple other parameters that make for a fine receiver. 73 Bob, K4TAX On 7/25/2015 3:20 PM, Scott Manthe wrote: No, and it's also from 2009, but that's not the point. The point is that there isn't going to be much difference between the 250hz 8 pole filter and the 200hz 5 pole filter. But think about your comment for a moment. A stock K3 with no additional filters is that good enough to rank that high. It might actually rank higher, because the ARRL and Sherwood methodologies differ. In any case, far too many people are far too concerned about the Sherwood rankings. Most people don't understand what the data mean and only worry about where a radio ranks on the list. The few dB between radios at the top of the Sherwood rankings means the list could probably be reordered based on component differences in production runs. Certainly a radio near the top ten is good enough. 73, Scott N9AA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] 200 Hz 5-pole filter
Am looking for a K3, 200 Hz 5-pole filter since Elecraft no longer sells them. Anyone out there have a spare? 73, Dan - N3ND __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
I noticed this as well. Does anyone know why Elecraft has stopped selling them? I was looking to put one in my sub-rx. (Sorry I can't help you with your request, Dan) 73, Scott N9AA On 7/24/15 7:18 PM, Dan Atchison via Elecraft wrote: Am looking for a K3, 200 Hz 5-pole filter since Elecraft no longer sells them. Anyone out there have a spare? 73, Dan - N3ND __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to scott.man...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
This filter was my secret weapon when the going got tough-- especially on 160/80/40 M during contests. Wonder if it will make a comeback. The 250 Hz filter is really something like 350 Hz and really too wide at times. 73 de Brian/K3KO On 7/25/2015 0:08 AM, Scott Manthe wrote: I noticed this as well. Does anyone know why Elecraft has stopped selling them? I was looking to put one in my sub-rx. (Sorry I can't help you with your request, Dan) 73, Scott N9AA On 7/24/15 7:18 PM, Dan Atchison via Elecraft wrote: Am looking for a K3, 200 Hz 5-pole filter since Elecraft no longer sells them. Anyone out there have a spare? 73, Dan - N3ND __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to scott.man...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to als...@nc.rr.com - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6081 / Virus Database: 4392/10301 - Release Date: 07/24/15 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] 200 Hz 5-pole filter
Hi Scott, I'm hoping we can offer them again in the future. We were looking at possible design/manufacturing changes about the time we all got really busy with the K3S. 73, Wayne N6KR On Jul 24, 2015, at 5:08 PM, Scott Manthe scott.man...@gmail.com wrote: I noticed this as well. Does anyone know why Elecraft has stopped selling them? I was looking to put one in my sub-rx. (Sorry I can't help you with your request, Dan) 73, Scott N9AA On 7/24/15 7:18 PM, Dan Atchison via Elecraft wrote: Am looking for a K3, 200 Hz 5-pole filter since Elecraft no longer sells them. Anyone out there have a spare? 73, Dan - N3ND __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to scott.man...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
